Bouncing Universes in String-inspired Gravity
High Energy Physics - Theory
2009-11-11 v2 Astrophysics
General Relativity and Quantum Cosmology
Abstract
We consider the effects on cosmology of higher-derivative modifications of (effective) gravity that make it asymptotically free without introducing ghosts. The weakening of gravity at short distances allows pressure to prevent the singularity, producing a solution with contraction preceding expansion.
Cite
@article{arxiv.hep-th/0508194,
title = {Bouncing Universes in String-inspired Gravity},
author = {Tirthabir Biswas and Anupam Mazumdar and Warren Siegel},
journal= {arXiv preprint arXiv:hep-th/0508194},
year = {2009}
}
Comments
28 pages, 2 figures; v2: added references